im getting the logitech z-5500's and ive never used a set of 5.1's speakers. i have an old sblive 5.1... anyways, my question, do i need to upgrade my sound card to take adavantage of the new technologies in dvds/games for my 5.1s (surround sound and such) or just stick with the old sblive 5.1? i mainly listen to music and watch dvds... once in a while i play games.